The Opelousas courier., 1887-11-12
SCIENTIFIC NOTES.

To make a strong cement mix some finely
powdered rice with cold water, so as to form
h soft paste. Add boiling water, and nnalIy
boil the mixture in q pan for one or two
minutes.
The coating of a rubber umbrella or a Cos
samer cloak or coat may be mendea 9y ap1
plying a preparation OF damar .Yarnlsh ana
.asphaltum with a little turpentlne III about
equal quantities.
The pruning of vines has been Investigated
by Fl. Mdeller, VINO finds mat the proper
the young shoots should be cut, as their de-
~velopment requires much sugar.
The strength of shaft or bars Of iron IS,
for bending and twisting strains, as me
cubes OF their diameter. Thus, a two-iDch
shaft is eight times as strong as a one-lnch
shaft, while a three-lnch shaft IS twenty
seven times as strong.
The latest cure for consumption is that a9-
yocated hy H.. Gsrein ,i before oansi the Il Pa tbs
inhalation of tiuohydric acid. The patient
remains for an hour daily in a cabinet OF SIX
cubic metres capacity, the. air OF which Is
saturated with huohydr1c acid.
In New Orleans, where the soil Is water
logged three feet beneath the surface, they
get over the difficulty OF putting telegraph
and telephone wires under the ground BIZ
erecting strong towers $50 feet high at inter-
walls, and bracing them together with cables
of steel-wire rope. These cables support the
| cross-arms, etc, to which the telegraph Il
telephone wires are attached, and the wires
| are securely carried above the public streets.
The towers are also utilized for hre-eXtln-
gushing purposes. as a stand-plpe, With noZ-
zles at different elevations, Is lifted to each
tower.
According to Fire and Water the soda-water
| tank now appears in a new rule-that OF a
neat and efficient e~xtinguisher of fire. Some
days ago a vessel filed with varnlsh was
accidentally set on fire in the cellar of q
| Louisville drug store, and 1t blaZed up
Ilz..,~l r. 1.o45pr II, frort Of tho ETJIi1Inr
| as high as the second floor. Before, however,
the flames could gain Roadway in the build
ing the heat had melted the lead pipe con-
nected with the n~ewly-charged soda tonne
tain and the flames were Instantly extlfS
guished. eD
The interesting statement is made iig0ghe
last municipal report of the corporate of
Chelsea, near London, that. contrary to
what has generally been assumed IN .as re-
ations of occupation and health, the bswer-
men of that place show marvellous heal and
vitality, Notwithstanding they spenofeven
hours daily in the sewers, often In e1bnped-
gerous matter. One of tho severity. who
IS now p%ensioned off, is elghty-slx EEI1rs old,
and was a sewerman for more thou ffHenty-
eight years: another who is yes, Safvork is
ton more than thirty years. eur. il
Prof. Karsten, a German ellie, at n, has
devised.a telephone SIREN y G~eorgbnsists
of 8 disk capable of being TapifI .a,raI7olved
T On ta aea 1f fest OF ed9 r adGaa na andy, Q. msf $
fixed the magnet and coil OF a~heepho1S, with
the diaphragm or plate remo1Fd. When the
disk is revoIved the rapid passage OF the
magnets in front OF the magnet coli OF the
telephone induces currentSin the coil, and
these are heard as a muslsSl note IN 9 seconc
telephone connecticut cRcult with the coil:
The note heard dependspn the arrangement
of vibrations per revolution equallng The
number of poles, if the latter are all OF ont
name-that is to say all north N.l or a.
south IS poles, When the order IS n. 81
s., or north and south poles alternately, thu
number of vibrations per revolution Il
halved. and so on. BY combining the sIre1
with an thermometer it is possible to tell thu
strength OF the wind by the note heafd Il
Experiments with the new self-excitin|
dynamo-electric machine invented by NM
Dandeu and Chertemps. show some interest
ing results. A wooden board is pierced wit
holes, in which are solidly fixed sly coils, an
is fixed on a support, and through, a hole i
It's centre passes q movable axis. In a plan
perpendicular to the board are two groups, o
three horsesNoe magnets, with coils slm1la
/ to those in the board, and making l20
revolutions per minute. 1t is on the tixe
= board thatthe currents aEe, collected by a
arrangement which allows Of grouping ther
in as many currents as there are cyLhpd Il r
not being used for the exterior work, bu
serving to excite the moving electromagnetic
The machine ia represented as consuming
+ motor force of only four horsepower viii
supplying ensJablochkoff candlesin a norma
way. The special merit OF this apparatus
according to the description, consists IN tn
suppression of the induction currents, Whlc
are produced in the heart Of the iron pies;
facing each other in other generators.
9 Electrical Reuieac.
The New York Medical Times has a goe
= word for alcohol, which it considers tt
prince OF antisenties and the most reliap
.-a1,,..n - s1i,o14hnpTn TAr+inTJInD I'll
y writer says: Diluted with equal parts
water, and given in small and lrepcate
doses, the malignant symptoms Of this mo
o fatal I1alady soon disappear and conyale
2ote with what facility the alcohol dlI
is solyes thu d~iphtheritic emulation in II
throat, lowers the Temperature and cain
d the pulse showing It's tS dest gsae a Mb;[
gained access 10 the blood. This rsmet
lie has been used by us in the treatInento OF dip
liberia since 1873. during which time !
II case of the disease has slipped through o.
. hands except in one solitary instance, al
III that case WAS in aTtIe2a0 7ft0ittS before O
remedy. was giyen. The remedy is also p,r
phyIactic to the disease, as we have found
t. many instances where 1t had not been eXT
dent TO quarantine the patient. For, IL
Ill purpose it is only necessary for exposed pr
VI sons to use tie, remedy, diluted az abo
III stated, as q gaTgle, and TO swallow a ntbie
it three or fonr times & day"
Prof. Tyndall, in o letter on lightning &C
ductors, points out that the abolition OF J
s~istance is absolutely necessary IN eonnecf1
q q lightning conductor with the earth, a.
this is done by closely imbedding in the eaf
a plate of good conducting material and
IVY large area. The lArgeness of area mai
Id atonement for the imperfect conduetlylty.
earth. The plate, in fact, constitutes q WI
3 door through which the electricity pass
freely into the earth, its disruptlye a
damaging effects being. thereby ayolde
or conductors adopted by ignorant pract1tle
he ers is, Dr.. Tyndall remarks. to carry t
he wire rope which forms part of t
ne conductor down the wall and into the eai
ars below, where it ends without any term1l
we plate. Such q protection" Is a nleckery
on d~eI17sion and q snare. Some years ago 8 re
as lighthouse on the Irish coast was struck
it lightning, when he found by the enginee
ng report that the lightning conductor had bt
he carried down the lighthouse tower, its 10y
ar extremity carefully Imbedded IN a stone p
%, s.orated to receive it. Ii the object had bt
es to invite the lightning to strike the towel
nc better arrangement could hardly, he
OF lieves, have been adopted. He vetoed
ne proposal to employ a chain as q prolongat
of the conductor, as the contact OF link W
lor link is never perfect.
ut, 4 paper by Alfred Fl. Cowles is soon to
issued by the United States Naval lnsflt
de- on aluminium bronze for heavy guns, Wh
viii be discussed at q meeting of the instltu
al Annapolis, on Oct. IT. Mr., Gov
lic. asserts that by either the Rodrnan
or Deane process of casting guns can
made of this alloy that will have
+ d much higher tensile strength and du
the ity than the finest quality OF mild steel fc
"a -xz,Il 10 sr0T1accihl0 m h1zp